Resuggestion: https://backpack.tf/suggestion/5dd490b1d381722f8305d3bf

Sale 1 & 2:

https://marketplace.tf/items/tf2/30673;5;u3030

$7.05 / $1.80 = 3.92 keys

$15 / $1.80 = 8.33 keys

Sale 3:

rounds to 12 keys

16 keys capped at 11.5 keys b/o: https://imgur.com/a/Lr0uxhB

Sold with 8 keys for Gfetti Tipped Lid(24 keys)

https://backpack.tf/profiles/76561198829709099#!/compare/1574035200/1574121600

https://backpack.tf/profiles/76561198099141522#!/compare/1574035200/1574121600

Sale 4:

bulk

https://backpack.tf/profiles/76561197994697258#!/compare/1571961600/1572048000

https://backpack.tf/profiles/76561198118150950#!/compare/1571961600/1572048000

Sale 5:

using there

Bubbling Whoopee Cap + 2 keys

https://backpack.tf/profiles/76561198928421771#!/compare/1573948800/1574035200

https://backpack.tf/profiles/76561197990076257#!/compare/1573948800/1574035200

Sale 6:

untrace

https://backpack.tf/profiles/76561198055991746#!/compare/1571184000/1571529600

https://backpack.tf/profiles/76561198043986991#!/compare/1571270400/1571702400

Sale 7:

untrace

https://backpack.tf/profiles/76561198418083011#!/compare/1572048000/1572307200

https://backpack.tf/profiles/76561198265116245#!/compare/1572134400/1572393600

=============================================================================

Untrace/crafted:

https://backpack.tf/item/4258472004

https://backpack.tf/item/4256011079

https://backpack.tf/item/4257985417

https://backpack.tf/item/4281922851

https://backpack.tf/item/4318602595

https://backpack.tf/item/4325667100

https://backpack.tf/item/4373446481

https://backpack.tf/item/4455064673

https://backpack.tf/item/4661410030

https://backpack.tf/item/4709285734

https://backpack.tf/item/5070218731

https://backpack.tf/item/5743627798

https://backpack.tf/item/6038920716

https://backpack.tf/item/6845986219

https://backpack.tf/item/7246145670

=============================================================================

Sales:

4, 8.5, 12

new sales:

https://backpack.tf/profiles/76561198314211872#!/compare/1575504000/1575590400 - Sold for 3 Keys + 16 Refined to a buy order

https://marketplace.tf/items/tf2/30673;5;u3030 - Sold for $10 when Keys were $1.75 (~5.5 Keys)

unsold for 2 weeks at 6.6 keys: https://imgur.com/a/TvXVgow

little mister shuffle boy wants 4-5.5: https://imgur.com/a/fWqUoyp